I travel I-57 north every Sunday in Illinois. Except for 1 time out of 30 trips, they've been out there, usually from MP 280 to 320, and sometimes around their 220 MP cop shop. Anyway, my detector is several years old. It doesn't have POP but has laser detect. I've never had a detect on any of these speedtraps.
Today, I noticed the cop that was using whatever device he was using to catch the perps. I didn't get a real good look but it was a handheld gun. He was pointing it out his open passenger window at oncoming traffic. It was black and looked to be about 6 inches high by 4 inches wide. I didn't see the the length of it or what the front looked like as I was travelling too fast to see all of that. He was pointing it as I passed and I had no detect whatsoever. What the heck was it?
I was using a Whistler 1730. Works fine around where I live in Indiana for the locals. I also have a Whistler 1610 but if it has laser detect, it doesn't have rear detect.